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Hand Held Tach
The radio modelers have developed a useful market for gadgets.
I bought a tach a while ago, and I keep meaning to mention it here. The price was right - around $25. It's intended for measuring off two or three blade props. In other words, it counts either two flashes or three as a revolution. When I point it at this screen (Free Agent News Reader) it registers 1800 rpm i.e 60 flashes / sec if I select two blade, or 1200 rpm if I select 3 blade. If I point it at a compact fluorescent, it indicates 3600 rpm (120 flashes/sec) People apparently use it with reflective patches stuck on their props Half inch numerals on an LCD display with a prop image (2 or 3 blade). Battery lasts a long long time. "Tower Hobbies Digital Mini-Tach" Brian W |
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